Ordering number : ENN8386 LA7784 Monolithic Linear IC Downconverter IC for Digital CATV http://onsemi.com Overview The LA7784 is a downconverter IC for digital CATV. It accepts RF input frequencies from 50 to 150MHz and supports the DOCSIS (USA) and Euro-DOCSIS (Europe) standards. Features • RF Mixer. • Attenuation control for RF Mixer. • Driver for SAW filter. • IF AGC amplifier. • IF Driver amplifier for ADC. Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Circuit voltages Circuit current Symbol VCC max V max I12, 13 Allowable power dissipation Pd max Conditions Ratings Pin 8, 14, 19, 20, 21, 22, 26, 27 Pin 9 Pin 12, 13 sink current Unit 6.0 V VCC V 2 Ta≤70°C V 900* mA Operating temperature range Topr -20 to +70 mW Storage temperature range Tstg -55 to +150 °C * On the board (114.3×76.1×1.6mm) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Operating Conditions at Ta = 25°C Parameter Symbol Conditions Ratings Unit Recommended supply voltage VCC Pin 8, 14, 19, 20, 21, 22, 26, 27 5.0 V Operating supply voltage range VCC op Pin 8, 14, 19, 20, 21, 22, 26, 27 4.5 to 5.5 V Semiconductor Components Industries, LLC, 2013 July, 2013 92706 / O2505 MS OT B8-6337 No.8386-1/7 LA7784 AC Characteristics at Ta = 25°C, VCC = 3.3V Parameter Symbol Pin No. Ratings Conditions min typ Circuit current Itotal 8, 14, 19, 20, 21, 22, 26, 27 No Signal 80 RF input frequency range f(RF) 23, 24 fc:-3dB 50 Unit max 105 RF AGC range GR1 26, 27 V9 = 2.5 to 0V 45 53 Mixer conversion gain CG1 26/23, 24 V9 = 2.5V 19 22 Mixer inter modulation 1 IM3 1 40 50 130 mA 150 MHz 25 dB dB 27/23, 24 IF input frequency range IF amplifier gain f(IF) G(AGC) 26/23, 24 Input = 75dBμ 27/23, 24 V9 = 2.5V 4, 5 fc:-3dB 30 12/4, 5 V9 = 2.5V 51 55 Output = 110dBμ 40 50 dB 100 MHz 59 dB 13/4, 5 IF inter modulation 2 IM3 2 12/4, 5 dB 13/4, 5 Range 12, 13 IF Output Level < ±1dB IF AGC output level Vo(IF) 1 GR2 12 Single output 3 1.0 5 Vp-p dB IF output level Vo(IF) 2 13 Single output 1.0 Vp-p Package Dimensions unit: mm 3222A No. 8386-2/7 LA7784 Pin Assignment NC 1 28 DRIVER GND NC 2 27 DRIVER OUTPUT IF AGC AMP GND 3 26 DRIVER OUTPUT IF AGC AMP INPUT 4 25 RF ATT GND IF AGC AMP INPUT 5 24 RF ATT INPUT NC 6 23 RF ATT INPUT IF AGC AMP GND 7 22 RF ATT VCC GND GND IF AGC AMP VCC 8 21 LNA VCC AGC CONTROL 9 20 DRIVER VCC NC 10 19 MIXER/LO VCC IF DRIVER AMP GND 11 18 NC IF DRIVER AMP OUTPUT 12 17 LO INPUT IF DRIVER AMP OUTPUT 13 16 LO INPUT IF DRIVER AMP VCC 14 15 MIXER/LO GND Block Diagram No. 8386-3/7 LA7784 Pin Description Pin Number (unit: Ω) Description 1 No Connection 2 No Connection 3 AGC Amp GND 4 AGC Amp Input Equivalent circuit 5 6 No Connection 7 AGC Amp GND 8 AGC Amp VCC 9 AGC Control 10 No Connection 11 Post Amp GND Continued on next page. No. 8386-4/7 LA7784 (unit: Ω) Continued from preceding page. Pin Number 12 Description Equivalent circuit Post Amp Outputs 13 14 Post Amp VCC 15 Mixer/LO GND 16 LO Input 17 18 No Connection 19 Mixer/LO VCC 20 Driver VCC Continued on next page. No. 8386-5/7 LA7784 (unit: Ω) Continued from preceding page. Pin Number 21 Description Equivalent circuit LNA VCC 22 23 LNA Inputs 24 25 LNA GND 26 Driver Outputs 27 28 Driver Gnd No. 8386-6/7 LA7784 Test Circuit ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PS No.8386-7/7